Device for removing flaws from steel billets while being rolled hot.



J. L. SMITH. DEVICE FOR REMOVING FLAWS FROM STEEL BILLETS WHILE BEING ROLLED HOT.

APPLICATION FILED DEC- 7. I9I8.

PatentedSept. 23, 1919.

2 SHEETSSHEET I I. L. SMITH. DEVICE FOR REMOVING FLAWS FROM STEEL BILLETS WHILE BEING ROLLED HOT.

APPLICATION FILED DEC. 7. I918.

Patented Sept. 23, 1919.

2 SHEETS-SHEET 2.

INVENTOR TTORNEY UNITED STATES PATENT oEEIoE.

JOHN L. SMITH, OF HAMILTON, ONTARIO, CANADA.

DEVICE FOR REMOVING FLAWS FROM STEEL BILLETS WHILE BEING ROLLED HOT.

Specification of Letters Patent.

Patented Sept. 23, 1919.

Application filed December 7, 1918. Serial No. 265,712.

To all whom it may concern:

Be it known that I, JOHN L. SMITH, a citizen of the Dominion of Canada, at present residing at Hamilton, in the Province of Ontario, Canada, have invented Devices for Removing Flaws from Steel Billets While Being Rolled Hot, of which the following is a specification.

My invention relates to the art of rollin steel billets. In rolling billets of steel, flaws appear on the surface of the billet, the same being caused by cracks in the ingot, unequality in the steel, etc.

The present way of removing these flaws is by chipping the same away by use of an air hammer and chisel, which is a very slow and costly operation. It is only on very particular material that one can afford to use the present method.

When the flaws are not chipped from the billets and the billets are sent to the finishing mills to be rerolled into the finished product, they cause a great deal of trouble by collecting in the entry and delivery guides of the rolls. When the following bar strikes the scrap in these guides, it becomes deflected from its course and causes a cobble, which is a total loss, except as scrap steel, and also delays the mill and reduces the tonnage.

Should the flaws remain on the finished bar, after the process of rolling, it isrejected by the inspector as scrap.

The present invention particularly has for its object to provide a simple, effective and easily operated device for quickly removing flaws from the billet, while the billet is being rolled.

Another object of the invention is to provide a device that can be placed between two stands of rolls or on the delivery side of the last set of rolls and generically the invention comprises a set of scrapers designed to engage the surfaces of the passing billet to remove the flaws, there being means provided for applying any desired pressure to the scrapers to hold them in contact with the billet, and means also being provided to guide the billet to the scrapers.

More specifically the invention provides a bed supporting the billet guide and supporting a pair of guideways, one vertical and the other transverse, there being a pair of scrapers in each guide way.

Between the scrapers of each pair, the billet is guided to pass.

are operated to engage and disengage the passing billet with whatever pressure may be desired.

In its more detailed nature, the invention embodies those novel features of construction, combination and arrangements of parts, all of which will be first fully described, and be specifically pointed out in theappended claims, reference being had to the accompanying drawings, in which:

Figure 1 is a side elevation, parts being shown in section, illustrating the invention in use.

.Fig. 2 is a top plan view of the invention.

Fig. 3 is a cross section on the line 33 on Fig. 2, looking in the direction of the arrow as.

Fig. 4 is an end elevation, looking in the direction of the arrow g in Fig. 2.

In the drawings in which like numerals of reference indicate like parts in all of the figures, 1 represents a stand of rolls through which the billet 2 is passed into the guide 3, which is suitably mounted on the bed 6 that is itself mounted on the base 5, the guide 3 being secured in a suitable guide box 4 in the usual way.

7 designates a vertical, standard having guide ways 8 for the vertically movable scrapers 9 and 10, the standard 7 having recesses 11 so that the links 14, which are connected to the scrapers, may be free to operate.

12 designates lugs in which levers 13 are pivoted, the levers 13 each being connected by the links 14 to the respective scrapers 9 and 10. They are also connected by links 15 to a pushbar 16 which is in turn connected to a cross bar or evener 17, the latter being connected to the piston rod 19 of the cylinder and piston device 18, through which power is applied, it being understood that compressed air, steam, water or any other suitable operating fluid is in roduced to the cylinde and piston device through a suitable duct and valve (not shown), as is the common practice in such devices.

The standard 7 is braced at its rear by diagonal braces 70 and is connected. by arms 21 to another standard 20 which is located in advance of the standard 7 and has transverse guide ways 22 for the transverse knives 23 and 24.

25 designates a bracket in which a lever 26 is fulcrumed, the lever 26 being connected by a link 27 to a transverse scraper 23Aand also being connected by a connecting rod 31 to a lever 29 which is fulcrumed in a lug 28 and is connected by a link 30 to the other transverse scraper 24.

32 is a push bar or link which is connected to the lever 29 and to the cross bar or evener 17, theconnection between the lever 29 and the bar 32 being preferably a pin and slot connection, as indicated in Fig. 3 of the drawings.

33 is a bracket extending from the bed 6, on which the piston and cylinder device 18 is mounted in any manner that may be convenient.

It should be understood that the edges of the knives or scrapers 910 and 28 24: are shaped to conform to the configuration of the particular billet being rolled.

In operation the scrapers are opened by the action of the piston and cylinder device Withdrawing the rod 19 to the left in Fig. 2 (the right in Fig. 3) thus pulling the cross bar 17 and consequently forcing the scrapers of each pair apart.

The scrapers are opened until the billet of steel passes through the same, then the cylinder and piston device is operated to apply pressure -to the rod 19 to force it toward the right in Fig. 2 (left in Fig. 3) which closes the scrapers on all sides of the billet. The scrapers then remove the flaws that are on the billet, as the billet passes throughthe same.

While I have shown a piston and cylinder device. for effecting the operation of the scrapers, it is obvious that an electricmagnetic or any other suitable operating instrumentality well known in the art for applying the necessary reciprocating forces to the rod 19, may be employed and, as the same, per se, is not a part of my invention, I do not deem it necessary toparticularly illustrate the same or make further reference thereto in this description.

' From the foregoing description taken in connection with the accompanying drawings, it will be observed that my device provid'es an inexpensive way of removingthe 'jections are saved by removing the flaws from the billets before they are delivered to the finishing mills.

What I clalm is:

1. A device for removin flaws from billets as they are being ro led, said device comprising a bed, vertical ways and transverse ways mounted on said bed, a pair of billet scrapers mounted in each way, said scrapers having billet engaging edges shaped to conform to the surface of the billet being rolled, lever and link mechanism for opening and closing the pairs of scrapers, and a cylinder and piston mechanism for operating said lever and link mechanism.

2. A device for removing flaws from billets as they are being rolled, said device comprising a bed, vertical ways and trans verse ways mounted on said bed, a pair of billet scrapers mounted in each way, said scrapers having billetengaging edges shaped to conform to the surface of the blllet being rolled, and lever and link mechanism for opening and closing the pairs of scrapers, means connecting the lever and link mechanisms of the respective pairs together to operate in unison and means including a reciprocating element for actuating said lever and link mechanisms to open and close the scrapers.

3. A device for removing flaws from billets as they are being, rolled, said device comprising a bed, vertical ways and transverse ways mounted on said bed, a pair of billet scrapers mounted in each way, said 

